1.
reaction, response
A response to something, either physical, emotional, or social.
彼の反応を見る。
Watch his reaction.
発表に対する反応はどうだった。
How was the reaction to the announcement?
薬を飲んだが、反応がなかった。
I took the medicine, but there was no response.
2.
chemical reaction
A process in which substances are changed into other substances.
化学反応が起きた。
A chemical reaction occurred.
酸とアルカリを混ぜると反応する。
When you mix acid and alkali, they react.
この実験では、熱を加えることで反応が速くなる。
In this experiment, the reaction speeds up when heat is applied.
反応 means reaction or response, used for both human responses and scientific reactions.
AS A SURU-VERB:
反応する: to react, to respond
COMMON TYPES:
- 化学反応: chemical reaction
- 過剰反応: overreaction
- 拒否反応: rejection reaction
- アレルギー反応: allergic reaction
- 連鎖反応: chain reaction
COMMON EXPRESSIONS:
- 反応を示す: to show a reaction
- 反応を見る: to watch for a reaction
- 反応がない: no response
- 反応が薄い: weak response
RELATED:
- 対応: response, handling
- 応答: reply, answer